/Engine/Source/Runtime/Experimental/Chaos/Public/RewindData.h
Gets access into buffer in non-decreasing FrameAndPhase order: x_{n+1} >= x_n If x_{n+1} == x_n we return null to inform the user (usefull when a single phase can have multiple writes)
T * WriteAccessNonDecreasing ( const [FFrameAndPhase](API\Runtime\Chaos\FFrameAndPhase) FrameAndPhase, [FDirtyPropertiesPool](API\Runtime\Chaos\Chaos\FDirtyPropertiesPool) & Manager )